xref: /openbmc/linux/drivers/bus/fsl-mc/obj-api.c (revision fec2432c)
1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
2 /*
3  * Copyright 2021 NXP
4  *
5  */
6 #include <linux/kernel.h>
7 #include <linux/fsl/mc.h>
8 
9 #include "fsl-mc-private.h"
10 
fsl_mc_get_open_cmd_id(const char * type)11 static int fsl_mc_get_open_cmd_id(const char *type)
12 {
13 	static const struct {
14 		int cmd_id;
15 		const char *type;
16 	} dev_ids[] = {
17 		{ DPRTC_CMDID_OPEN, "dprtc" },
18 		{ DPRC_CMDID_OPEN, "dprc" },
19 		{ DPNI_CMDID_OPEN, "dpni" },
20 		{ DPIO_CMDID_OPEN, "dpio" },
21 		{ DPSW_CMDID_OPEN, "dpsw" },
22 		{ DPBP_CMDID_OPEN, "dpbp" },
23 		{ DPCON_CMDID_OPEN, "dpcon" },
24 		{ DPMCP_CMDID_OPEN, "dpmcp" },
25 		{ DPMAC_CMDID_OPEN, "dpmac" },
26 		{ DPSECI_CMDID_OPEN, "dpseci" },
27 		{ DPDMUX_CMDID_OPEN, "dpdmux" },
28 		{ DPDCEI_CMDID_OPEN, "dpdcei" },
29 		{ DPAIOP_CMDID_OPEN, "dpaiop" },
30 		{ DPCI_CMDID_OPEN, "dpci" },
31 		{ DPDMAI_CMDID_OPEN, "dpdmai" },
32 		{ DPDBG_CMDID_OPEN, "dpdbg" },
33 		{ 0, NULL }
34 	};
35 	int i;
36 
37 	for (i = 0; dev_ids[i].type; i++)
38 		if (!strcmp(dev_ids[i].type, type))
39 			return dev_ids[i].cmd_id;
40 
41 	return -1;
42 }
43 
fsl_mc_obj_open(struct fsl_mc_io * mc_io,u32 cmd_flags,int obj_id,char * obj_type,u16 * token)44 int fsl_mc_obj_open(struct fsl_mc_io *mc_io,
45 		    u32 cmd_flags,
46 		    int obj_id,
47 		    char *obj_type,
48 		    u16 *token)
49 {
50 	struct fsl_mc_command cmd = { 0 };
51 	struct fsl_mc_obj_cmd_open *cmd_params;
52 	int err = 0;
53 	int cmd_id = fsl_mc_get_open_cmd_id(obj_type);
54 
55 	if (cmd_id == -1)
56 		return -ENODEV;
57 
58 	/* prepare command */
59 	cmd.header = mc_encode_cmd_header(cmd_id, cmd_flags, 0);
60 	cmd_params = (struct fsl_mc_obj_cmd_open *)cmd.params;
61 	cmd_params->obj_id = cpu_to_le32(obj_id);
62 
63 	/* send command to mc*/
64 	err = mc_send_command(mc_io, &cmd);
65 	if (err)
66 		return err;
67 
68 	/* retrieve response parameters */
69 	*token = mc_cmd_hdr_read_token(&cmd);
70 
71 	return err;
72 }
73 EXPORT_SYMBOL_GPL(fsl_mc_obj_open);
74 
fsl_mc_obj_close(struct fsl_mc_io * mc_io,u32 cmd_flags,u16 token)75 int fsl_mc_obj_close(struct fsl_mc_io *mc_io,
76 		     u32 cmd_flags,
77 		     u16 token)
78 {
79 	struct fsl_mc_command cmd = { 0 };
80 
81 	/* prepare command */
82 	cmd.header = mc_encode_cmd_header(OBJ_CMDID_CLOSE, cmd_flags,
83 					  token);
84 
85 	/* send command to mc*/
86 	return mc_send_command(mc_io, &cmd);
87 }
88 EXPORT_SYMBOL_GPL(fsl_mc_obj_close);
89 
fsl_mc_obj_reset(struct fsl_mc_io * mc_io,u32 cmd_flags,u16 token)90 int fsl_mc_obj_reset(struct fsl_mc_io *mc_io,
91 		     u32 cmd_flags,
92 		     u16 token)
93 {
94 	struct fsl_mc_command cmd = { 0 };
95 
96 	/* prepare command */
97 	cmd.header = mc_encode_cmd_header(OBJ_CMDID_RESET, cmd_flags,
98 					  token);
99 
100 	/* send command to mc*/
101 	return mc_send_command(mc_io, &cmd);
102 }
103 EXPORT_SYMBOL_GPL(fsl_mc_obj_reset);
104